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Asked what would make him return to the UK, Sir Roger said: “Being able to afford a house in the country. I would come back like a shot.”

Speaking about Mr Cameron’s recent decisions in Europe, the actor, who said he had always been a Conservative, said the Prime Minister had his support and described members of the Tory party who opposed him as “traitors”.

“I think he’s doing absolutely wonderfully well, despite the opposition from many members of his own party. Traitors, I call them,” he said.

He added: “I mean any hardliner within the Conservative Party who speaks out against their leader. You should support your leader.”